Compilare: user.cpp: In function ‘int main()’: user.cpp:99:13: warning: unused variable ‘k’ [-Wunused-variable] int N,i,k; ^ user.cpp: In function ‘int mutari(char*, int&, int, int, int, int&)’: user.cpp:92:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:101:28: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%d", &N ); ^ user.cpp:105:33: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( fin, "%s", cuv ); ^